NOKIA Scalable IP Networks Set 2

PPP supports multipoint access networks with many stations. The all 1's acts as a broadcast. ✘ PPP supports multipoint access networks with many stations. The all 1's acts as a multicast. ✘ PPP supports point-to-point networks only. The address field is fixed. ✘ PPP supports point-to-point networks only. The address field can change dynamically since every station is assigned a PPP address. ✔

Application data is transported in 53-byte cells. ✘ ATM circuits are identified by a VPI/VCI value. ✘ Provides enhanced QoS support with 5 classes of service. ✘ Ideal for multiple services on the same physical line. ✔ All of the above. ✔

Destination address ✘ Frame check sequence ✘ Preamble ✘ Length field ✔

Ethernet 802.3 can only be used on point-to-point links, while Ethernet II can be used on broadcast networks. ✘ In Ethernet II the 2 bytes after the source MAC address is used as a type indicator. In Ethernet 802.3 these two bytes indicate the length of the frame. ✘ In Ethernet 802.3, the 2 bytes after the source MAC address is used as a type indicator. In Ethernet II these two bytes indicate the length of the frame. ✘ Ethernet II and Ethernet 802.3 are two different names for the same protocol ✔

2B-28 ✘ 00-20 ✘ CE-2B-28 ✘ 00-20-60 ✔

Anycast. ✘ Multicast. ✘ Broadcast. ✘ Unicast. ✔

Half-duplex transmission is less efficient because the frame MTU is smaller. ✘ Half-duplex transmission is only 30-40% efficient because of collisions. ✘ Ethernet switches support half-duplex transmission only. ✘ All of the above. ✔

The host will retransmit the frame if it detects a collision during transmission. ✘ The host is able to detect the transmission speed of the Ethernet switch port to which the host is connected. ✘ The host will only transmit data when it detects that no other devices are transmitting. ✘ The host will only transmit upon a timer expiry. ✔ The host will only transmit when it receives the token. ✔

10 Mb/s Ethernet. ✘ 100 Mb/s Ethernet. ✘ 1000 Mb/s Ethernet . ✘ There are copper and optical versions possible for all of these Ethernet data rates. ✔

100 m. ✘ 500 m. ✘ 1 Km. ✘ 10 Km. ✔